Which of the following expressions gives the resistance of a uniform cylindrical…

PHYSICS · Single correct · A Level · Physics · Electricity · Electricity

Problem

Which of the following expressions gives the resistance

R

of a uniform cylindrical conductor of length

L

, cross-sectional area

A

and resistivity

\rho

? (a)

R = \dfrac{4\rho L}{A}

(b)

R = \dfrac{\pi\rho L}{A}

(c)

R = \dfrac{\rho L}{A}

(d)

R = \dfrac{\rho L}{2A}

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